Then Luis Madrigal, 27, her boyfriend of 13 years, demanded to know if she’d cheated on him, according to court documents obtained by the publication. Madrigal told police that Gemino confessed to an affair with a "better lover."

Madrigal, who told police he "snapped," beat her to death with a tire iron and scratched the word "cheater" into the hood of her car so "police would know why the murder occurred," reported The Arizona Republic.